To the Editor.— Tinea versicolor, a superficial mycosis due to Malassezia furfur , is one of the more common problems seen in everyday dermatologic practice. It most commonly involves the upper part of the trunk, but numerous other localizations have been reported. A survey of the literature failed to reveal any prior reports of cases involving the penis. Report of a Case.— A 63-year-old Negro man who has been treated for neurodermatitis during the past five years was seen on Oct 16, 1970, for routine follow-up care. Treatment had consisted of topically applied triamcinolone acetonide (0.025%; Kenalog) and 25-mg prednisolone acetate injections at periodic intervals. At this time, he also had multiple hypopigmented and scaly macular lesions over the penis with several lesions of the right cubital fossa. No other areas of involvement were found. A potassium hydroxide preparation revealed the typical hyphae and spores of M furfur . The patient was